Reformulation of the MODTRAN band model for higher spectral resultion

摘要

The MODITRAN 1 cm~(-1) band model has been reformulated for application to higher spectral resultion. Molecular line center absorption is still determined from finite spectral bin equivalent wideths but is now partitioned between the bin containing the molecular transition and its nearets neighthbor bin. Also, the equivalent widthj calculation has been upgraded to retatin to minatain high accuracy at the increased spectral resultion. The MODTRAN Lorentz line tail spectral bin absorption coefficient data has been replaced by a more general and accurate Pade approximant for Voigt line tails, and higher oder pressure depdencies are now modeled. Initial comparisons to the FASE model and to measurement data are presented.